Memcached memory usage
Solution 1:
As Mike said, you can look at the line including the "STAT bytes" to see memory usage:
$ echo "stats" | nc -w 1 <host> <port> | awk '$2 == "bytes" { print $2" "$3 }'
Solution 2:
memcache's default port is 11211 so if memcache is local
telnet localhost 11211
Then run the stats command and that will spit out memory usage
stats
Solution 3:
I personally use PhpMemcacheAdmin
http://code.google.com/p/phpmemcacheadmin/
It creates an easy to use GUI. Of course you'll need to have PHP support.
Solution 4:
Another alternative to answer @mike,
echo "stats" | nc localhost 11211
#or
echo "stats settings" | nc localhost 11211